mFax - mFax is a cloud-based fax solution for sending and receiving faxes from any device.
ictfax - ICTFAX is web based and open source Fax software, It is multi users and suitable to offer online Fax services, including Email to Fax, Fax to Email and Web to Fax. ICTFAX application support FoIP, T38 and G.711 pass through faxing also PSTN fax.
Hellofax - Easy. Reliable. Online faxing. Send & receive faxes from anywhere.
ActFax - ActFax by ActFax Communication-Software GmbH - Fax Server and Email Software for Windows, Terminal Server, Citrix and Unix - ActiveFax Server
eFax - Over 11 million people use eFax every day for their fax communications.
HylaFAX+ - HylaFAX+ is an enterprise-class open-source system for sending and receiving facsimiles as well as...